Assessment of amateur fishing and its impact on the state of stocks of aquatic biological resources on the Ob river and its tributaries (Chulym, Tom) within the boundaries of the Tomsk region

Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,A.V. Tsapenkov,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,D.L. Suknev,A.L. Abramov,E.A. Interesova,M.V. Selezneva,V.F. Zaitsev,Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk ,V.A. Shatalin

doi:10.33920/sel-09-2312-04

Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk , Novosibirsk Branch Of The Vniro (“Zapsibniro”), Russia, Novosibirsk + Show 12 more

https://doi.org/10.33920/sel-09-2312-04

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Abstract

Amateur fishing is one of the types of activities for the extraction (catch) of aquatic biological resources, which affects their stocks. As part of the state task, VNIRO conducts annual monitoring of amateur fishing and analyzes its impact on the state of aquatic life stocks. The paper presents the seasonal results of observations for the period from September 2022 to August 2023, including: the number of days suitable for amateur fishing, the number of amateur fishermen, the species composition of catches and an estimate of the volume of their catch. An assessment of the impact of amateur fishing on the stocks of aquatic biological resources is presented. The largest quantitative catch falls on pike (18.2%), perch (17.9%), roach (11.3%), ide (11.1%), and also, mainly on the Tom — Yelets river (16.1%), and in the mass unit of measurement — on pike, accounting for 50.7% of the total catch weight in year. The largest number of amateur fishermen and the volume of fish caught by them falls on the summer and autumn periods. In the autumn period, pike is caught better than at other times of the year, and more experienced amateur anglers come to such fishing. The seasons of the year are also significantly different in terms of the average number of amateur fishermen per day and the duration of fishing, there are the least number of winter fishing enthusiasts, which is due to weather conditions and meager catches. In spring, the average number of amateur fishermen per day increases by 2.5 times, and in summer it is already 6.5 times more than in winter. The average duration of fishing also increases from the winter period (2 hours) to the summer (6 hours). In general, the impact of amateur fishing on aquatic biological resources is assessed as weak, but there is pressure on certain species that are in the greatest consumer demand.

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